根区通气方式对番茄根际气体环境及基质理化性质的影响

摘要

为改善根际气体环境,研究3种不同根区通气方式,即根区水平通气(Q1)、根区垂直通气(Q2)和自然渗透(Q3)(以无通气处理为对照),对番茄根区气体环境及基质理化性质的影响.结果表明,通气处理明显改善了根区气体环境,O2体积分数以Q1处理为最高,而CO2体积分数以对照为最高;各通气处理的基质体积质量和相对体积质量均降低,而通气处理基质的持水量、毛管孔隙度、总孔隙度和通气孔隙度均有所增加.碱解氮和速效磷含量以Q2处理为最高,速效钾和有机质含量以Q1处理为最高.%In this paper, the effect of different root-zone aeration methods on tomato plant was studied.The results showed that the contents of CO2 and O2 in the root zone were significantly different among the treatments and CK, of which CO2 content of CK was the highest(2.3 ％).The capillary,total porosity and aeration porosity were higher under the treatments of aeration, but the soil bulk density and soil specific gravity were lower.On the other hand, the O2 content of Q1 treatment was the highest(17.9％).The Q2 treatment had a high value of the available N content and the available P content on root, but the Q1 treatment had a high value of the available K content and the organic.